Machine for molding artificial stone.



PATENTED MAR. 20, 1906.

N. F. PALMER. MACHINE FOR MOLDING ARTIPIGIALSTQNE.

APPLIOATION FILED NOV.7'.19 ')5.

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flznesses M FPaZmer PATENTEDMAR. 20, 1906.

N. 2, PALMER.' y MACHINE FOR MOLDING ARTIFICIAL STONE.

APPLIU ATIOII FILED NOV. 7. 1905. I

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plate 6,

'upon bottom plate I) PATENT OF ICE;

* UNITED srn rns Specification of Letters Patent. A li ati fil d November 7,1905. Serial No. 286,196.

Patented March 20, 1906.

To all whom it may concern.-

Be it known that I, NoYEs F. PALMER, a citizen of the United States, residing at New York city, Brooklyn, county of Kings, State of New York, have invented new and useful Improvements in Machines for Molding Artificial Stone, of which the following is a specification. p

This invention relates to an improved machine for molding artificial stone, and more partlcularly to means for protecting the machine against any cement that may be spilled around the mold, and also to means for reinforcing the mold.

In the accompanying drawings, Figure 1 is a side elevation of my improved machine for molding artificial stone; Fig. 2, a plan thereof with the false bottom omitted, and Fig. 3 is a detail of one of the brackets.

The machine comprises a mold having four sides a, which are slidable upon a bottom that projects beyond such sides. The mold is opened or closed by means of four intergeared shafts c, which are operatively connected with sides a-by racks a and pinions 0. Thus by turning a handle 0 on one of the shafts c the sides a will be simultaneously moved inward or outward.

Within the mold are inclosed a series of cores 01, mounted upon a core-plate d, having downwardly-extending racks d These racks are en aged by pinions e of a countershaft 6, which is intergeared with a shaft f, having handle by a train of gearing f. The shaft 6 is likewise intergeared by wheels e with a set of toothed lifters 9, that are adapted to engage a false bottom g, resting By manipulating handle f the coresd will be lowered, while the green stone supported upon false bottom g Will be simultaneously raised, all substantially as described in Patent No. 700,551, issued to me May 20, 1902.

To each of the sides a' there is secured at each end an outwardly-extending bracket H, Fig. 3, projecting over bed-plate b. Bracket H is preferably composed of two upright sides h h, a bottom plate if, and a top plate 79. The side it has a horizontal slot h, engaged by a bolt 11, that connects the bracket adjustably to side a. The two top plates k of each pair of brackets H su port a guard or shelf secured to such brackets by bolts y", passing throu h openings k of the top plates. The surface 0 each guard j is flush with the 5 5 upper edge of its side a and forms a horizontal outward extension of such side, Fig. 1. These guards 9' have for their object to protect the machine from any cement that may be spilled around the mold while the latter is charged or w lo the cement is tamped or stuck 0H, so that clogging is, prevented and clean working is insured. The edge bottom plate 7L2 is beveled or sharpened to constitute a scraper 7L6, which sweeps all particles of cement off base-plate 6 around sides a as the mold is being 0 ened.

In order to ock the sides a and prevent them from bulging outward during the tamping operation,'I have devised the following construction: The bed-plate b is provided opposite the outer side of each of the extending at right sides a with a slot 6,

angles to such side. This slot receives the lower end of a post or pivot 76, adjustably secured thereto by nut 7c. Upon post in turns an oval cam Z, which when swung inward will engage side a at its center and securely lock the same against bulging during the tamping operation. When the mold is to be opened the cams are rotated by handholds Z to release sides a and permit them to be spread by turning handle 0 In this way the machine is reinforced in such a manner that all form.

What I claim is 1. In a machine for molding artificial stone, a mold having slidable sides, combined with a pair of brackets each having two up- 0 right sides, a top plate and a bottom plate, means for securing said brackets to one of the mold sides, and a shelf supported upon the brackets, substantially as specified.

In a machine for molding artificial 5 stone, a mold having slidable sides and a bottom plate projecting beyond such sides, combined with brackets projecting outwardly from the sides and having a beveled lower edge, and with shelves supported on the loo brackets, substantially as specific 3. In a machine for molding artificial stones will turn out' true and unistone, a mold having slidable sides and a Signed by me at New York city, (Manhatslotted bottom plate projecting beyond such tan,) New York, this 6th day of November, sides, combined With posts adjustably se- 1905.

cured to the slotted bottom plate, and with NOYES F. PALMER. cams that are rotatable on the posts and are Witnesses: adapted to engage the sides, substantially WILLIAM SOHULZ,

as specified. I FRANK V. BRIESEN. 

